Nouns denoting natural phenomena

cold weather
a period of unusually cold weather
continental drift
the gradual movement and formation of continents (as described by plate tectonics)
light emitted during absorption of radiation of some other (invisible) wavelength
dust devil
a miniature whirlwind strong enough to whip dust and leaves and litter into the air
a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
(physics) deformation of a physical body under the action of applied forces
the retarding force of air friction on a moving object
a cloud of fine particles suspended in a gas
a powdery deposit on a surface
(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
(physics) a manifestation of energy; the transfer of energy from one physical system to another expressed as the product of a force and the distance through which it moves a body in the direction of that force
rocket propulsion
reaction propulsion using stored oxygen for combustion; used where there is insufficient atmospheric oxygen
a storm in which violent winds are drawn into the column of hot air rising over a severely bombed area
the resistance encountered when one body is moved in contact with another
(economics) any indirect effect of public expenditure
magnetic resonance
resonance of electrons or atoms or molecules or nuclei to radiation frequencies as a result of space quantization in a magnetic field
placebo effect
any effect that seems to be a consequence of administering a placebo; the change is usually beneficial and is assumed result from the person's faith in the treatment or preconceptions about what the experimental drug was supposed to do; pharmacologists were the first to talk about placebo effects but now the idea has been generalized to many situations having nothing to do with drugs
materials like aluminum or platinum become magnetized in a magnetic field but it disappears when the field is removed
brush discharge
discharge between electrodes creating visible streamers of ionized particles
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